README web version of /home/usg/OPS/MTS/readme_xml/readme_80067500

Principal Investigator Email Address

• ryde@astro.uu.se

Estimated Total Execution Time (hours, including overheads)

• 23:58:39

General Description

• Absoption spectra of metal-poor giants will be recorded at high SNR since
   the lines
  are very weak. Telluric standards are needed in the 1090nm setting. A telluric star,
   chosen from
  the CAL OBs (or similar ones), should be taken every night. Moreover one telluric
  should be taken at high AM and one at low AM during the run.
  
  In the finding charts from 2mass there is an artifact to the north-east of every
   science object (probable arising
  from the fact that the stars are bright). The science stars are always the brightest
   one in the J images.
  
  All our objects can be used as AO stars.
  
  The R magnitudes are estimated from V (Simbad) and subtracting a V-R color (Allen's
   Astrophysical Quantities).
  B-R is estimated from B(Simbad) - R(estimated above).
  
  The exposure times were estimated with the ETC for a seeing of 1.2.

Waiver Requests

• 2 waivers were granted. A few stars have an executing time of 1:02 hours.
   
  A vawelength setting was changed from 52/0/n to 52/0/i.
  The Waivers were sent on July 13 and they were granted on July 18 2007.

Critical Observing Condition Constraints

• None

Time-Critical Aspects

• None

Special Execution Requirements

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Special Calibration Information

• Please, observe a telluric standard every evening. Please, choose a telluric
   star close to the 
  science targets or at similar airmass and time. I have suggested four stars. Similar
   star would 
  work just as well: they should be hot stars (B-stars) that are rapidly rotating
   
  (approximatley vsimi>200 kms-1). S/N per pixel per exposure = 200 at the 1090
   setting or a
  SNR per resolution element above 600; SpTypes of the suggested telluric stars are
   B1V, 
  B2V, B5V, and B5IV. Also, during the run, observe one telluric star at high air
   mass and one at 
  low airmass.
  
  Telluric standars are need to remove the telluric lines in the spectrum. The SNR
   should be better
  than the scince spectra.
  
  Special request for SNR for the flats: We are aiming at a high SNR for the science
   targets and therefore 
  we need extra high SNR in the flats too. Please, thererfore, take 3 series of flats
   in the morning 
  (instead of the standard one series of flats) for the settings of our targets.

ToO Information

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ToO Activators List

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Do the README file and the instrument comments of the telluric stars
 OBs include the required S/N/pixel of the spectrum of the telluric star, its spectral
 type and allowed spectral range?

• YES

Do any OBs include wavelength or flatfield calibrations?

• N/A

If you are observing Moving Targets, have you attached suitable ephemeris
 files to your OBs?

• N/A

If the slit viewer guide star is different from the target, are the RA
 and DEC offsets accurate to within 0.05 arcsec and do they take into account the
 relative proper motion between the two objects?

• N/A

If you have preferences which OBs should be executed first for objects
 at similar RA, did you make use of the User Priority field in the OBs?

• N/A